Technical questions
How do you get photos at an event with a QR code?
The short answer
Place a visible QR code at the event. The guest scans it with their phone camera and lands on the event page in the browser, with nothing to install.
A QR code works well when it is placed where people stop anyway: the entrance, the bar, the tables, or a photo spot.
From the page that opens, the guest can upload a photo, take a matching selfie, or get to the gallery, depending on how the event is set up.